Re: Fate of the MD-11, MD-90, MD-95

Date:         19 Dec 96 03:06:32 
From:         kls@ohare.Chicago.COM (Karl Swartz)
Organization: Chicago Software Works, Menlo Park, California
References:   1 2 3
Next article
View raw article
  or MIME structure

>The DC-10 and L-1011 were designed before ETOPS, so they had to have
>the distinctive 3rd engine.

The main reason for the third engine on those planes was to meet the
payload and range requirements with available engines.  As airlines
pushed the requirements, the planes outgrew what could be powered by
only two 1970 vintage engines.

In fact, pre-ETOPS ICAO requirements for overwater operations mandated
safe diversion with *two* engines out.  At high weights, this rule
effectively precluded even tri-jets.

Karl Swartz	|Home
Moderator of sci.aeronautics.airliners -- Unix/network work pays the bills